Just redid my C drive, got SP3 (for good or ill), and was reinstalling "usual suspects" for apps; went great 'til getting to iTunes. This and that suddenly wouldn't install; "check that you have Admin. privileges," etc. -I am the Admin. -I shut off security apps, etc., during iTunes installation. Only thing I can remotely think of, that may suddenly be killing the iTunes installation process is: - something to do with SP3, perhaps or - possibly, Spybot, or Spywareblaster? Think I ran into problem while back re Spywareblaster, and its killbit for some ActiveX file; not sure how far/wide and deep Spybot and Spywareblaster write their protections into a system so I can't address that with any real knowledge. I do have (luckily) have cloned copy of C on another drive, from about two weeks ago via Casper 4.0. I suppose I could find all references in that copy/registry of C re Apple, iTunes, QT, and its Bonjour service and merge those into current C drive's reg., but I can see where that may lead to further woes if I miss something. And, I suppose at worst, I could go on using other drive for music and so on, but... the fact this isn't working is a real fly in the ointment after redoing current C drive. If anyone has ideas on how to solve this, I'd be most appreciative of any help on this. And it could be I missed the obvious, like, do I need Flash or similar applet for iTunes to install and/or work? I did get the most recent ver. of Java, if that has any bearing on the matter. Thanks, again, for any ideas about this.